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.\" Common Development and Distribution License ("CDDL"), version 1.0.
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.\" 1.0 of the CDDL.
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.\" Copyright 2015 Joyent, Inc.
.\"
.Dd November 27, 2023
.Dt PR_GETRLIMIT 3PROC
.Os
.Sh NAME
.Nm pr_getrlimit ,
.Nm pr_getrlimit64
.Nd inject getrlimit system call into victim process
.Sh LIBRARY
.Lb libproc
.Sh SYNOPSIS
.In libproc.h
.Ft int
.Fo pr_getrlimit
.Fa "struct ps_prochandle *P"
.Fa "int resource"
.Fa "struct rlimit *rlp"
.Fc
.Ft int
.Fo pr_getrlimit64
.Fa "struct ps_prochandle *P"
.Fa "int resource"
.Fa "struct rlimit64 *rlp"
.Fc
.Sh DESCRIPTION
The
.Fn pr_getrlimit
function injects the
.Xr getrlimit 2
system call into the target process
.Fa P
by means of the agent LWP.
If the process handle
.Fa P
is the value
.Dv NULL
then this will be equivalent to calling
.Xr getrlimit 2
on the currently running process.
.Pp
The arguments
.Fa resource
and
.Fa rlp
have the same meaning as in
.Xr getrlimit 2 .
See
.Xr getrlimit 2
for the full description and purpose of the
.Sy getrlimit
system call and its arguments.
.Pp
The
.Fn pr_getrlimit
function only works on active processes.
Process handles that correspond to core files, zombie processes, or ELF objects
do not support system call injection.
.Pp
The
.Fn pr_getrlimit64
function is equivalent to
.Fn pr_getrlimit ;
however, rather than having the rlimit information be subject to the data model
of the target process, they always provide 64-bit rlimit information.
See
.Xr lf64 7
for more information.
.Sh RETURN VALUES
Upon successful completion, the
.Fn pr_getrlimit
function's return value is that described in
.Xr getrlimit 2 .
Otherwise,
.Sy -1
is returned and
.Sy errno
is set to
.Er ENOSYS
to indicate that the system call could not be injected.
.Sh ERRORS
For the full list of errors see the
.Sy ERRORS
section in
.Xr getrlimit 2 .
.Pp
The
.Fn pr_getrlimit
function will fail if:
.Bl -tag -width Er
.It Er ENOSYS
An error occurred while trying to invoke the agent LWP and inject a
system call in the process handle
.Fa P
or the process handle
.Fa P
does not support system call injection.
.El
.Sh INTERFACE STABILITY
.Sy Uncommitted
.Sh MT-LEVEL
See
.Sy LOCKING
in
.Xr libproc 3LIB .
.Sh SEE ALSO
.Xr getrlimit 2 ,
.Xr libproc 3LIB ,
.Xr proc 5 ,
.Xr lf64 7
